Aircooled Monoshocks

hi guys im in the middle of sortin my ty250 mono you know that 40 quid pile i bought anyway its got a steel tank on it and its quite rusty inside and was wodering what i can do to sort it , it already has bits rattling around in the bottom and i wondered if there is anything like cure rust i can treat it with , might sound like a daft question but ive been outbid on every tank on evilbay thanks ps anyone know where i can get a tank cover?

Hello all Iam trying to identify my ty250 mono ,I was told by the seller it was a1989 model but according to the numbers its not ,the engine no is 38V-010***is a 1986 2AF European model and frame no is 4AJ-0020** is a 1991 Japanese Model,can anyone confirm these numbers I can't find much in the way of info on the web,I know its quite easy to build a bike from different parts but just in case I have the wrong info I'am asking on here. cheers.. Pat...

Help! I bought a 240 JCM trials bike some time ago which appeared to work perfectly. However, I've since discovered that when the engine is hot, she's difficult, nay impossible, to start. Then when the engine cools down, she starts perfectly again. I suspect that it could be a problem with the little red box thing under the petrol tank which I think is something to do with electronic ignition perhaps??? I've thrashed her with a leafy branch, called her a few unprintable names and locked her away in solitary confinement for a few months but she still flatly refuses to behave. Any technical advice would be much appreciated. http://s605.photobucket.com/albums/tt136/b...nt…

Hi Anyone know how to clamp the damper rod without damaging it so I can unscrew (I'm assuming its screwed in??) the damper from the shock base. I've tried a couple of pieces of wood in the vice but can't get enough grip. I want to strip an early TY mono shock (the one without the remote reservoir) so I can give it a good clean etc. Cheers Tim

hi guys can anyone help im trying to remove the engine in my ty250 mono but i cant get the bolt out that runs thru the rear of the engine case and the swingarm, i have tried heat, wd40 and i just cant get it to move and cant replace the mains and oil seals till i get it out thanks in advance j ps runing out of knuckles to skin now

Yamaha TY 250 mono on ebay item no 260361410268. Anyone know anything about these, also mention of a new exhaust system coming out ?? Sorry I can't do link it doesn't work .

hi all just a quickie need to replace the main bearings in my ty and have found out that the part number is a 6206 c3 thing is are the bearings handed left and right or can i just buy a pair of bearings thanks

I'm freshening up the engine from my 87' garelli as been as it's never been touched since new, and not sure wether to have the cylinder replated or have a steel liner pressed in instead??? Originally the hiro engines have a plated bore!! What do people think about this???

Hi ! Anyone ever fit an alloy swingarm wheel & Disc to a TY mono from another bike, it seems it would be a great mod. The early gas-gas look similar ? Mine is a drum brake 84-87 TY250 Mono red frame. With a normal pinging motor ....PWK28 on the way from an yz85

Its nice to see these bikes riding some hardcore sections!!

I found this video clip last week, it's awesome to see so many rare bikes in the thick of it!!! http://www.youtube.com/watch?v=He7OW8YVdX0

As title suggests, I am trying to rebuild my Montesa Cota 310, just wondering if anyone had a parts or repair manual, the engine runs a real treat, just the rest of the bike is the problem! I think the rear linkage is upside down???? Sits very low, so need some info. Thanks in Advance. Ivan

I have a 1991 model TY250R with the plastic tank. I have attempted to put new decals on it but within a day they have formed hundreds of bubbles underneath. Anyone have any suggestions? Is there something I can prime/seal the tank with to stop the vapour seeping through?

Hi All. I have just bought one of these. Is there a difference between a TLM 200R and a TLM 200 (do they both exist?)?. The guy I bought it off ran it pre mix at 40:1. What is factory ratio? I run my other bikes at 50:1 - would the TLM be OK at this ratio? It would save me having two batches around. Are there any good websites for info on this bike? I'd like to find out about any potential problems/issues and any easy, cheap worthwhile mods. I'm used to a TY175 and this thing has enormous instant grunt compared to the Yam. Should be interesting. Should I have posted in the Honda section (it did seem to be all about TLR version in there)? Thanks in advance for any h…

I'm planning to convert a Hiro 125 engine from the end of the 70's into a trial engine. Why? Who knows! The engine has six speeds and a reed valve. It's from an Ancillotti 125 moto cross bike. I have the Ancillotti frame too but it's too heavy and wide to converted into a trial frame. So the frame would be some monoshock (or twinshock) trial frame. Any opinions, advices, ideas etc.?

I have a Delorto PHBH26 carb which I have had from new basicaly I am thinking of off loading it and do not want to mislead any one so am looking for some advice as to how good my memory is (and if the carb is of any use) I owned a 1984 250 mono (first ones out) For some reason at this time it was the thing to do to change the carb to make the bike run better I used it for a year then sold the bike but kept the carb Is my memory correct and is this a thing anyone else remembers. I can't even remember if it was significantly any better than standard any views ??

I've got an 87' garelli 323, but when i search the net i'm struggling to find much info on the garelli trials bikes??? Anyone know much about them or got any links??

I have a TY250 that I planed on doing a disk brake conversion on, so today a buy a complete 1988 Beta Tr34 with a dead motoplat[no spark] was going to take the wheels and brakes off of it but i get to lookin at this bike and it is in really decent shape, as good as my TY anyways. i start thinkin maybe I should get a stator for this bike and ride it. I guess I could always find another front wheel for the TY. Had a beta Techno and it was a nice bike but Ive never ridden the tr34. Anyone else ride a TR34?

I have the chance to pick up one of these bikes but know nothing about this model. I seem to be missing the gap between the 349 wich I owned and the 310 wich was much more like the modern cota. Are spares easy to get? Did they send very many to the U.S.? i just picked up an old TY250r mono thats in good shape and has had many of that periods mods already done. Maybe I should pick up the cota and sell the TY. Thoughts anyone?

I have taken the engine out of my 87' Garelli 323 section today ready to do a freshen up its all original and has never been touched. I've taken the top end off and the piston is looking a bit ropey even though the bike ran fine!!! Anyone know where i can get a piston kit and engine gasket set for the Hiro engine????